It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) did not deliver any sermon to us without saying that he has no faith who is not trustworthy, and he has no religion who does not keep his promises.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13199
Hadith Gradingحکم دارالسلام:حدیث حسن، وهذا إسناد ضعیف لضعف أبی ھلال الراسبی، وسلف ھذا الحدیث من حسن بن موسی وحدہ برقم: 12567 وانظر: 12383